參數(shù)資料
型號(hào): HA16117F
廠商: Hitachi,Ltd.
英文描述: CMOS Watchdog Timer
中文描述: 看門狗定時(shí)器的CMOS
文件頁(yè)數(shù): 27/31頁(yè)
文件大?。?/td> 249K
代理商: HA16117F
HA16117F Series
27
1 M
P-RUN Input Frequency vs. K (
Tadj constant
)
P-RUN High Threshold Frequency vs. C
F
Capacitance
P
P
0.55
Tadj constant
K
100 k
10 k
1 k
100
10
1
0.7
0.8
0.6
Ta = 25
°
C
K=
R
1
+ R
2
R
2
500 p
10 k
1000 p
0.01
μ
0.03
μ
100 k
1 M
10 M
P
H
External capacitance C
F
(F)
Ta = 25
°
C
MPU system abnormal
MPU system normal
MPU system abnormal
MPU system normal
K =R
1
+ R
2
R
2
0.01
μ
duty 50%
0 V to 5 V duty 50%
0.1
μ
R
2
R
1
V
CC
Tadj
P-RUN ACC
C
F
5 V
5V
0V
GND
C
R
Pulse
generator
C
F
C
R
510 k
750 k
V
CC
Tadj
P-RUN ACC
C
F
5 V
GND
C
R
Test circuit
Oscilloscope
Pulse
generator
Test circuit
Oscilloscope
RES
RES
Notes: 1.
2.
Normal detection is assumed when RES is not output.
The figure at left is for a constant P-RUN frequency.
Notes: 1.
2.
Normal detection is assumed when RES is not output.
The figure at left is for a constant P-RUN frequency.
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